Specifications

1979 Volvo 264 265
Torque exhaust manifold nuts
The manifold nuts should be torqued at the 600-1,200 mile (1,000-2,000 km) inspection. A loose
manifold could alter air/fuel ratio and cause an increase in emission and/or poor driveability.
Valves
The valve clearance should be checked every 30,000 miles (50,000 km).
Vacuum fittings, hoses and connections
Unstable idle, misfiring or poor emission control is often caused by leaking vacuum hoses or
connections. Check hoses and connections on distributor vacuum unit, connections on heater control
servo systems and hydraulic brake servo.
II Engine Fuel System
Fuel (91 octane RON)
Unleaded fuel is required for models with catalytic converter (all models).
A label on the instrument panel and on the rear fender, near the filler inlet, will remind of this
requirement.
It is unlawful to dispense leaded fuel into a vehicle labeled "unleaded gasoline only".
CI system
The B27F engine is provided with a fuel injection system called the CI system (Continuous Injection).
Fuel injectors are open and inject fuel as long as the engine is operating.
This system has few moving parts, is reliable and meets the exhaust emission standards at maximum
efficiency.
Air supplied to the engine is continuously measured and determines the amount of fuel injected.
The air flow is regulated by two throttle valves.
The air flow sensor and the fuel distributor are integrally built as a single unit. A lever is actuated by the
air flow to produce continuous fuel distribution.
Special instructions for work on the fuel injection system
Extreme cleanliness is essential when working on the injection system. Great care must be observed.
Injection system service should be handled by qualified technicians, using equipment intended for this
service.
Fuel (line) filter
The fuel filter is located on the firewall. This filter is to be changed every 15,000 miles (25,000 km). The
filter is replaced as one complete unit.
Replace more frequently if contaminated fuel was introduced into the tank.
Air cleaner
Replace the air cleaner cartridge with a new one every 30,000 miles (50,000 km). The cartridge should
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